Lunette ring lock



FIG. 1 is a top perspective view of a lunette ring lock showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevational view thereof; and,

FIG. 7 is an exploded perspective view thereof. 

The ornamental design for a lunette ring lock, as shown. 